28991015424001 has 2 divisors, whose sum is σ = 28991015424002. Its totient is φ = 28991015424000.

The previous prime is 28991015423999. The next prime is 28991015424089. The reversal of 28991015424001 is 10042451019982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28985560862976 + 5454561025 = 5383824^2 + 73855^2 .

It is a cyclic number.

It is not a de Polignac number, because 28991015424001 - 2¹ = 28991015423999 is a prime.

Together with 28991015423999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28991015424101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14495507712000 + 14495507712001.

It is an arithmetic number, because the mean of its divisors is an integer number (14495507712001).

Almost surely, 2^{28991015424001} is an apocalyptic number.

It is an amenable number.

28991015424001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28991015424001 is an equidigital number, since it uses as much as digits as its factorization.

28991015424001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 28991015424001 in words is "twenty-eight trillion, nine hundred ninety-one billion, fifteen million, four hundred twenty-four thousand, one".